diff --git a/app/Http/Controllers/Admin/PlatformOrderController.php b/app/Http/Controllers/Admin/PlatformOrderController.php
index 9e882a9..929631e 100644
--- a/app/Http/Controllers/Admin/PlatformOrderController.php
+++ b/app/Http/Controllers/Admin/PlatformOrderController.php
@@ -310,6 +310,40 @@ class PlatformOrderController extends Controller
         return redirect()->back()->with('success', '订单已标记支付并生效，订阅已同步：' . $subscription->subscription_no);
     }
 
+    public function markActivated(Request $request, PlatformOrder $order): RedirectResponse
+    {
+        $admin = $this->ensurePlatformAdmin($request);
+
+        // 仅标记“已生效”：用于处理已支付但未生效的订单（不改 payment_status）
+        if ($order->payment_status !== 'paid') {
+            return redirect()->back()->with('warning', '当前订单尚未支付，无法仅标记为已生效。');
+        }
+
+        if ($order->status === 'activated') {
+            return redirect()->back()->with('warning', '当前订单已是已生效状态，无需重复操作。');
+        }
+
+        $now = now();
+        $order->status = 'activated';
+        $order->activated_at = $order->activated_at ?: $now;
+        $order->save();
+
+        // 轻量审计：记录这次“仅标记生效”的动作，便于追溯
+        $meta = (array) ($order->meta ?? []);
+        $audit = (array) (data_get($meta, 'audit', []) ?? []);
+        $audit[] = [
+            'action' => 'mark_activated',
+            'scope' => 'single',
+            'at' => $now->toDateTimeString(),
+            'admin_id' => $admin->id,
+        ];
+        data_set($meta, 'audit', $audit);
+        $order->meta = $meta;
+        $order->save();
+
+        return redirect()->back()->with('success', '订单已标记为已生效（未修改支付状态）。');
+    }
+
     public function export(Request $request): StreamedResponse
     {
         $this->ensurePlatformAdmin($request);
diff --git a/resources/views/admin/platform_orders/index.blade.php b/resources/views/admin/platform_orders/index.blade.php
index bebbc83..0f74d20 100644
--- a/resources/views/admin/platform_orders/index.blade.php
+++ b/resources/views/admin/platform_orders/index.blade.php
@@ -354,6 +354,14 @@
                         <button type="submit" @disabled(! $canMarkPaid)>标记支付并生效</button>
                     </form>
 
+                    @php
+                        $canMarkActivatedOnly = ($order->payment_status === 'paid') && ($order->status !== 'activated');
+                    @endphp
+                    <form method="post" action="/admin/platform-orders/{{ $order->id }}/mark-activated" onsubmit="return confirm('确认将该订单标记为已生效？（不修改支付状态，不自动同步订阅）');" class="mb-6">
+                        @csrf
+                        <button type="submit" @disabled(! $canMarkActivatedOnly)>仅标记为已生效</button>
+                    </form>
+
                     <form method="post" action="/admin/platform-orders/{{ $order->id }}/activate-subscription" onsubmit="return confirm('确认同步订阅？将根据该订单创建/续期订阅');">
                         @csrf
                         <button type="submit" @disabled(! $canActivate || $alreadySynced)>{{ $alreadySynced ? '已同步' : '同步订阅' }}</button>
diff --git a/resources/views/admin/platform_orders/show.blade.php b/resources/views/admin/platform_orders/show.blade.php
index 495050b..d13bd7a 100644
--- a/resources/views/admin/platform_orders/show.blade.php
+++ b/resources/views/admin/platform_orders/show.blade.php
@@ -44,6 +44,14 @@
             @csrf
             <button type="submit" @disabled(! $canActivate || $alreadySynced)>{{ $alreadySynced ? '已同步' : '同步订阅' }}</button>
         </form>
+
+        @php
+            $canMarkActivatedOnly = ($order->payment_status === 'paid') && ($order->status !== 'activated');
+        @endphp
+        <form method="post" action="/admin/platform-orders/{{ $order->id }}/mark-activated" onsubmit="return confirm('确认将该订单标记为已生效？（不修改支付状态，不自动同步订阅）');">
+            @csrf
+            <button type="submit" @disabled(! $canMarkActivatedOnly)>仅标记为已生效</button>
+        </form>
     </div>
 
     @if(! $canActivate)
diff --git a/routes/web.php b/routes/web.php
index 83439bd..578a5de 100644
--- a/routes/web.php
+++ b/routes/web.php
@@ -108,6 +108,7 @@ Route::prefix('admin')->group(function () {
         Route::get('/platform-orders/{order}', [PlatformOrderController::class, 'show']);
         Route::post('/platform-orders/{order}/activate-subscription', [PlatformOrderController::class, 'activateSubscription']);
         Route::post('/platform-orders/{order}/mark-paid-and-activate', [PlatformOrderController::class, 'markPaidAndActivate']);
+        Route::post('/platform-orders/{order}/mark-activated', [PlatformOrderController::class, 'markActivated']);
 
         Route::get('/site-subscriptions', [SiteSubscriptionController::class, 'index']);
         Route::get('/site-subscriptions/export', [SiteSubscriptionController::class, 'export']);
diff --git a/tests/Feature/AdminPlatformOrderMarkActivatedTest.php b/tests/Feature/AdminPlatformOrderMarkActivatedTest.php
new file mode 100644
index 0000000..28c49d8
--- /dev/null
+++ b/tests/Feature/AdminPlatformOrderMarkActivatedTest.php
@@ -0,0 +1,148 @@
+<?php
+
+namespace Tests\Feature;
+
+use App\Models\Merchant;
+use App\Models\Plan;
+use App\Models\PlatformOrder;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Tests\TestCase;
+
+class AdminPlatformOrderMarkActivatedTest extends TestCase
+{
+    use RefreshDatabase;
+
+    protected function loginAsPlatformAdmin(): void
+    {
+        $this->seed();
+
+        $this->post('/admin/login', [
+            'email' => 'platform.admin@demo.local',
+            'password' => 'Platform@123456',
+        ])->assertRedirect('/admin');
+    }
+
+    public function test_platform_admin_can_mark_paid_order_as_activated_without_changing_payment_status(): void
+    {
+        $this->loginAsPlatformAdmin();
+
+        $merchant = Merchant::query()->firstOrFail();
+        $plan = Plan::query()->create([
+            'code' => 'mark_activated_plan',
+            'name' => '标记生效测试套餐',
+            'billing_cycle' => 'monthly',
+            'price' => 10,
+            'list_price' => 10,
+            'status' => 'active',
+            'sort' => 10,
+            'published_at' => now(),
+        ]);
+
+        $order = PlatformOrder::query()->create([
+            'merchant_id' => $merchant->id,
+            'plan_id' => $plan->id,
+            'order_no' => 'PO_MARK_ACTIVATED_0001',
+            'order_type' => 'renewal',
+            'status' => 'pending',
+            'payment_status' => 'paid',
+            'plan_name' => $plan->name,
+            'billing_cycle' => $plan->billing_cycle,
+            'period_months' => 1,
+            'quantity' => 1,
+            'payable_amount' => 10,
+            'paid_amount' => 10,
+            'placed_at' => now()->subMinutes(10),
+            'paid_at' => now()->subMinutes(5),
+            'meta' => [],
+        ]);
+
+        $this->post('/admin/platform-orders/' . $order->id . '/mark-activated')
+            ->assertRedirect();
+
+        $order->refresh();
+        $this->assertSame('activated', $order->status);
+        $this->assertSame('paid', $order->payment_status);
+        $this->assertNotNull($order->activated_at);
+
+        $audit = (array) (data_get($order->meta, 'audit', []) ?? []);
+        $this->assertNotEmpty($audit);
+        $this->assertSame('mark_activated', (string) data_get(end($audit), 'action'));
+    }
+
+    public function test_cannot_mark_unpaid_order_as_activated(): void
+    {
+        $this->loginAsPlatformAdmin();
+
+        $merchant = Merchant::query()->firstOrFail();
+        $plan = Plan::query()->create([
+            'code' => 'mark_activated_plan2',
+            'name' => '标记生效测试套餐2',
+            'billing_cycle' => 'monthly',
+            'price' => 10,
+            'list_price' => 10,
+            'status' => 'active',
+            'sort' => 10,
+            'published_at' => now(),
+        ]);
+
+        $order = PlatformOrder::query()->create([
+            'merchant_id' => $merchant->id,
+            'plan_id' => $plan->id,
+            'order_no' => 'PO_MARK_ACTIVATED_0002',
+            'order_type' => 'renewal',
+            'status' => 'pending',
+            'payment_status' => 'unpaid',
+            'plan_name' => $plan->name,
+            'billing_cycle' => $plan->billing_cycle,
+            'period_months' => 1,
+            'quantity' => 1,
+            'payable_amount' => 10,
+            'paid_amount' => 0,
+            'placed_at' => now()->subMinutes(10),
+        ]);
+
+        $this->post('/admin/platform-orders/' . $order->id . '/mark-activated')
+            ->assertRedirect();
+
+        $order->refresh();
+        $this->assertSame('pending', $order->status);
+        $this->assertSame('unpaid', $order->payment_status);
+    }
+
+    public function test_guest_cannot_mark_order_as_activated(): void
+    {
+        $this->seed();
+
+        $merchant = Merchant::query()->firstOrFail();
+        $plan = Plan::query()->create([
+            'code' => 'mark_activated_plan3',
+            'name' => '标记生效测试套餐3',
+            'billing_cycle' => 'monthly',
+            'price' => 10,
+            'list_price' => 10,
+            'status' => 'active',
+            'sort' => 10,
+            'published_at' => now(),
+        ]);
+
+        $order = PlatformOrder::query()->create([
+            'merchant_id' => $merchant->id,
+            'plan_id' => $plan->id,
+            'order_no' => 'PO_MARK_ACTIVATED_0003',
+            'order_type' => 'renewal',
+            'status' => 'pending',
+            'payment_status' => 'paid',
+            'plan_name' => $plan->name,
+            'billing_cycle' => $plan->billing_cycle,
+            'period_months' => 1,
+            'quantity' => 1,
+            'payable_amount' => 10,
+            'paid_amount' => 10,
+            'placed_at' => now()->subMinutes(10),
+            'paid_at' => now()->subMinutes(5),
+        ]);
+
+        $this->post('/admin/platform-orders/' . $order->id . '/mark-activated')
+            ->assertRedirect('/admin/login');
+    }
+}